I have a few spare glass bottles and want to explore what decoration I can make with them, without just painting outside them.
Preferably safe, in case of an accidental breakage or leak. Preferably indefinite shelf-life.
Some ideas:
- Density layering experiments (‘rainbow in a jar’, maybe suspending an upside-down toy boat in a dense clear liquid with a blue watery liquid on-top)
- Phosphorescent liquids to glow in the dark (pref with no UV lamp needed)
- The oil+water+antacid+food coloring lava lamp, but the effect is probably too short-lasting to have running for a few hours
The blood of the foes who have fallen before you.
Ferrofluid for sure
The proper stuff is expensive (~$1USD/ml), NileRed’s recipe is 2chem4me, but the cheaper ferrous suspension methods might be workable…
Have you considered Spiegel im Spiegel.
Do you mean an infinite mirror, like this?

Meth
Sand art.
My kids made tgat for mothersday once. Looks actually nice. It’s still on display after 5 years or so

Tempted to try the Traffic Light Reactuon, but I don’t know how safe it is to store something that alkaline in a regular glass bottle long-term
Water and food coloring in a window is pretty sweet. Especially with multiple colors.









